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    CVE-2008-0610

    Stack-based buffer overflow in the ClientConnection::NegotiateProtocolVersion function in vncviewer/ClientConnection.cpp in vncviewer for UltraVNC 1.0.2 and 1.0.4 before 01252008, when in LISTENING mode or when using the DSM plugin, allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a modified size value.

    Published:Feb 6, 2008
    Last Modified:Apr 23, 2026
    EPS:Feb 6, 2008
    EPSS Score:0.74834
    CVSS Score:9.3

    Affected Products

    Vendor
    Ultravnc
    Product
    Ultravnc

    Exploits

    http://www.securityfocus.com/bid/27561http://www.securityfocus.com/bid/27561https://www.exploit-db.com/exploits/18666

    Related CVEs

    CVE-2026-4962 (CVSS 6.4) — A security flaw has been discovered in UltraVNC up to 1.6.4.0. Affected by this issue is some unknown function…
    CVE-2026-3787 (CVSS 6.4) — A weakness has been identified in UltraVNC 1.6.4.0 on Windows. This affects an unknown function in the library…
    CVE-2020-37134 (CVSS 4.6) — UltraVNC Viewer 1.2.4.0 contains a denial of service vulnerability that allows attackers to crash the applicat…
    CVE-2020-37133 (CVSS 6.7) — UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in the Repeater Host configuration field …
    CVE-2020-37132 (CVSS 6.7) — UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in its password configuration properties …
    CVE-2010-5248 (CVSS 6.9) — Untrusted search path vulnerability in UltraVNC 1.0.8.2 allows local users to gain privileges via a Trojan hor…
    CVE-2009-0388 (CVSS 10) — Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and (2) TightVnc 1.3.9 allow remote VNC ser…
    CVE-2008-5001 (CVSS 9.3) — Multiple stack-based buffer overflows in multiple functions in vncviewer/FileTransfer.cpp in vncviewer for Ult…
    CVE-2006-2206 (CVSS 10) — The MS-Logon authentication scheme in UltraVNC (aka Ultr@VNC) 1.0.1 uses weak encryption (XOR) for challenge/r…

    References

    http://forum.ultravnc.info/viewtopic.php?t=11850
    http://secunia.com/advisories/28747
    http://sourceforge.net/project/shownotes.php?release_id=571174&group_id=63887
    http://ultravnc.svn.sourceforge.net/viewvc/ultravnc/UltraVNC%20Project%20Root/UltraVNC/vncviewer/ClientConnection.cpp?sortby=date&r1=169&r2=168&pathrev=169
    http://www.exploit-db.com/exploits/18666
    http://www.kb.cert.org/vuls/id/721460
    http://www.securityfocus.com/bid/27561
    http://www.securitytracker.com/id?1019293
    http://www.vupen.com/english/advisories/2008/0392
    http://forum.ultravnc.info/viewtopic.php?t=11850
    http://secunia.com/advisories/28747
    http://sourceforge.net/project/shownotes.php?release_id=571174&group_id=63887
    http://ultravnc.svn.sourceforge.net/viewvc/ultravnc/UltraVNC%20Project%20Root/UltraVNC/vncviewer/ClientConnection.cpp?sortby=date&r1=169&r2=168&pathrev=169
    http://www.exploit-db.com/exploits/18666
    http://www.kb.cert.org/vuls/id/721460
    http://www.securityfocus.com/bid/27561
    http://www.securitytracker.com/id?1019293
    http://www.vupen.com/english/advisories/2008/0392

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High